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Issue 25, 2013
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Tailoring iron complexes for ethylene oligomerization and/or polymerization

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Abstract

Recent progress in the use of iron-based complex pre-catalysts for ethylene reactivity is reviewed, illustrating the current state-of-the-art and the potential usefulness of such systems for delivering solely ethylene oligomerization or polymerization products. The problems associated with the industrial use of late transition metal complex pre-catalysts are generally regarded as catalyst deactivation and the formation of more products of lower molecular weight at elevated temperature. These problems have been addressed for iron-based complex pre-catalysts via the fine tuning of substituents of existing ligands and/or the design of new ligand sets. Results revealed that modified bis(imino)pyridyliron dichlorides were capable of operating at elevated temperatures, and were capable of delivering highly linear polyethylene. Other new models of iron complexes have achieved high activity for ethylene oligomerization and/or polymerization. Particularly successful has been the use of the 2-iminophenanthrolyliron pre-catalyst, which have now been utilized in a 500 tonne pilot plant.

Graphical abstract: Tailoring iron complexes for ethylene oligomerization and/or polymerization

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Publication details

The article was received on 04 Oct 2012, accepted on 20 Nov 2012 and first published on 20 Nov 2012


Article type: Perspective
DOI: 10.1039/C2DT32337K
Citation: Dalton Trans., 2013,42, 8988-8997
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    Tailoring iron complexes for ethylene oligomerization and/or polymerization

    W. Zhang, W. Sun and C. Redshaw, Dalton Trans., 2013, 42, 8988
    DOI: 10.1039/C2DT32337K

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